Improvement in pump-plungers



G. H. OORLISSJ Pump-Plunger.

No. 215.801. Pate n'ted May 27. 1379.

UNITED STATES PATENT GEORGE H. O ORLISS, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN PUMP-PLUNGERS.

Specification forming part of Letters Patent No. 215,801, dated May 27,1879 application filed 7 January 3, 1879.

To all whom it may concern:

Be it known that I, GEORGE H. GonLIss, of Providence, in the State ofRhode Island, have invented certain new and useful Improvements relatingto Pump-Plungers, of which the following is a specification.

My invention is especially intended for large pumps used in pumpingagainst a high head, for the supply of towns and cities, but isapplicable in all cases where the plunger is separate from its rod andrequires to be fixed th ereupon.

The following is a description of my invention as applied to a plungerhaving the two ends alike.

The accompanying drawings form a part of this specification.

Figure 1 is an elevation of one end. Fig.2 is a longitudinal section ofthe other end, showing the removable part. Fig. 3 is an end View, seenfrom below, representing the removable part at the lower end.

Similarletters of reference indicate like parts in all the figures.

A is the hollow body of the plunger. The main cylindrical part thereofmay be thin; but at the conical ends it should bestronger. There is aconical chamber, A in the center of each end somewhat larger than theplungerrod B. The ends being alike, a description of one will sufficefor both.

The conical. chamber in the center of the plunger end (marked A) has itslarger end outward. The casting 0, preferably of soft brass, ispeculiarly formed, and adapted to serve several purposes.

The main plate D serves as a bearing for the key M. The conicalextension 0 fits the conical chamber A and, being forced into its place,is compressed around the plunger-rod B, making a perfectly water-tightand permanent joint.

In the casting O, the exterior of which is formed so as to complete theconical ends of the plunger A, provision is made at d for holding thetransverse wire "In, which confines the cotter-key M.

The forms of the several parts are shown in the figures. The proportionsare so adjusted that when the parts are brought together the lip orconical hollow edge 0 bears in its corresponding chamber A before thegeneral face of the casting O meets the end of the plunger A. Forcebeing then applied, the faces of the casting O and the plunger A arebrought together; and by the same action the conical lip (3 is made toclasp the rod 13, making the permanent water-tight joint required.

It is an essential condition to the best working of the plunger that itshould displace ap proximately its weight of water, so that the frictionin its bearings due to its own gravity is avoided.

\Vhen the key M has been driven tightly home it may be confined by anordinary pinching-screw or other means. For this purpose I have shownthe wire 1n passed through holes in the end casting D and the key M, andhaving its ends bent to retain it in its place.

I claim as my improvement 1. The end casting 0, having a thincompressible lip, O, in combination with the rod B, and with themainhollow shell A, having a tapering hole, adapted to receive and com pressthe lip A as the parts are drawn together, as

herein specified.

2. The double-ended plunger described, having a tapering end piece, O,with a compressible lip, G, at each end, and provided with keys M, so asto not only make the tight joint required around the rod, but also tobrace the plunger firmly against a motion in either direction on therod,'all substantially as herein specified.

In testimony whereof I have hereunto set my hand this 19th'day ofDecember, 1878, in the presence of two subscribing witnesses.

GEO. H. OORLISS.

Witnesses:

JEssE WALRATH, GEO. W. KENNEDY.

